You usually become part of a botnet by a virus infected program/game.
botnet...
A botnet is a collection of compromised computers connected to the Internet (each compromised computer is known as a 'bot'). When a computer is compromised by an attacker, there is often code within the malware that commands it to become part of a botnet. The "botmaster" or "bot herder" controls these compromised computers via standards based network protocols such as IRC and http.
Botnet is a collective of computers linked together to form a network of computing power typically used for malicious intent. Once a computer is infected through software it can perform tasks without the owner knowing it.
Yes, you can get arrested for botnet if it is found to have been used for malicious activity..
You can't remove a botnet, it's task for government, police and the like.
Buy a botnet.
Viruses can cause many problems with your computer. Usually, they will steal your information, display pop-up ads on your computer, slow your computer down, or use your computer in a botnet attack. Some of the really nasty viruses can even destroy your hard drive or delete your files.
Some of the most mild forms of computer viruses do almost nothing. They sit on your computer, trying to spread themselves to other computers whenever possible. These kinds of viruses may cause your computer to participate in a botnet attack on a website or computer system, or they may be used to assist a hacker in gaining access to your system.
Botnet
Spam composes roughly 84% of all emai sent every day, but has been dropping some since the 2010 conviction of some BotNet creators. A BotNet is a collection of computers that have been compromised to send out spam without the computer's owner knowing about it. This makes the cost of ownership and bandwidth practically non-existant for BotNet creators. Just one computer, such as a laptop at a coffee shop, is needed to send out an update to millions of these 'Zombie' machines. It seems that one person in 12.5 Million, actually replies and purchases a product through spam. That one person makes up a 'Net Gain' for the spam sending BotNet and the companies that pay the spammers to send out their message. A large chunk of Spam is actually based in crime. The products are fake but the form to send in your credit card information is not.
Well mostly it depends on the kind of virus but generally it could be a botnet that takes controll of your PC without your permission, a keylogger, spam, or destruction. Hope this helps! and if you have any questions juz contact me.
botnet